I just updated all of Alpha_Omegasis' mods, which adds the following to the 2.0-compatible list. (Those aren't just compatibility updates; they're the result of a huge refactor over the last two weeks, including 25,275 lines changed across 17 mods, 336 files, 58 commits, and 8 pull requests.)

✓ Build Endurance

✓ Build Health

✓ Buy Back Collectables

✓ Fall 28 Snow Day

✓ Happy Birthday

✓ More Rain

✓ Museum Rearranger

✓ Night Owl

✓ Save Anywhere

✓ Save Backup

✓ Stardew Symphony

And Alphablackwolf updated their mods for compatibility:

✓ Skill Prestige

✓ Skill Prestige: Cooking Adapter

Including some new workarounds, the migration so far has increased SMAPI 2.0 compatibility from 53% to 72% of known mods so far:

The migration is now complete at 89% compatibility (with many of the remaining 11% having broken in Stardew Valley 1.1 or 1.2). All open-source mods are now compatible (except Makeshift Multiplayer which will be updated soon, and Showcase + SCCL whose authors are inactive). The remaining mods are closed-source, some of which may be updated after the SMAPI 2.0 release.